Align OAMD metadata delay with decoder output
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@@ -179,7 +179,7 @@ def _expand_events(events, total_samples, rate, update_quantum_samples,
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raise ValueError(f"未知 trajectory_mode: {trajectory_mode}")
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def build_adm_tracks(index, frames=None, rate=48000, frame_samples=1536,
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update_quantum_samples=64, object_delay_samples=640,
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update_quantum_samples=64, object_delay_samples=1473,
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trajectory_mode="compact"):
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"""从统一 metadata index 构造 15 条 ADM 轨迹。
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@@ -187,7 +187,7 @@ def build_adm_tracks(index, frames=None, rate=48000, frame_samples=1536,
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OAMD 的内外层 sample offset、block offset 和 ramp 均保留。
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``trajectory_mode="compact"`` 用一个长 ADM interpolation block 表示每条
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线性 ramp;``dense64`` 保留逐 64-sample 展开作为兼容回退。
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``object_delay_samples`` 将位置更新与对象逆 QMF 的输出时刻对齐。
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``object_delay_samples`` 将位置更新与对象 PCM 的 decoder 输出时刻对齐。
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slot1..15 与对象 PCM ch1..15 一一对应。
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"""
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frames = index.rows if frames is None else frames
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